Roundway Hill sits at the far western end of the Marlborough Downs, enjoying views far across the Bristol Avon Vale, the Vale of Pewsey, and the edge of Salisbury Plain.<br /><br />On its summit is Oliver’s Castle - an Iron Age hillfort named after Oliver Cromwell following a civil war battle fought nearby in 1643 (a Royalist cavalry unit crushed the Parliamentary army which was besieging the Royalist stronghold of Devizes just down the road).